[Resolved] Thumbnails not cropping

So I’m uploading images to my portfolio website. These are large portrait images. I set the image as the featured image. When I view my thumbnails, they take forever to load since they’re loading in just a squashed version of the whole image. So I then go in to edit my featured image, crop to a new thumbnail size. Save, update, then refresh the page. Nope. My cropped thumbnail still isn’t showing.